US3237011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical heterodyne demodulator
Assignee: RCA Corp
•
Filing: 1963-02-04
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Granted: 1966-02-22
•
Expires: 1983-02-04
Abstract
No abstract record available.
Inventors
- 👤 Sterzer Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:56
CPC Classifications
G; G02; G02F; G02F2/00; G02F2/002
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
56 words
THE METHOD OF DEMODULATING A MODULATED LIGHT BEAM COMPRISING THE STEPS OF PRODUCING A BEAM OF PHOTOELECTRONS MODULATED SUBSTANTIALLY AT THE FREQUENCY OF MODULATION OF SAID MODULATED LIGHT BEAM, HETERODYNING A FIRST TRAVELING WAVE WITH SAID BEAM OF PHOTO-ELECTRONS FOR PRODUCING A SECOND TRAVELING WAVE, AND DETECTING ONE OF THE SUM FREQUENCY AND THE DIFFERENCE FREQUENCY.
References Cited (Backward Citations)
US2265784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |